480 



INDEX. 



Wallace, A. R., on the Bee's cell, and 

 on the origin of species, 303. 



Wallich, Dr. G. C, on the distinctive 

 characters, habits, and reproductive 

 phenomena in Amoeban Rhizopods, 

 111, 448; on the existence of liv- 

 ing Diatoms on the sea-bottom at 

 great depths, 166. 



Williams, W., on the breeding of a 

 West-Indian Tortoise in Great 

 Britain, 159. 



Wortley, Lieut. -Col. Stuart, on the 

 habits of Pagurus Prideauxii and 

 Adamsia palliata, 388. 



Wucherer, Dr. O., on the Craspedo- 

 cephali of Bahia, 242; on the Ophi- 

 dians of Bahia, 323. 



Xenodon, new species of, 353. 



Xenurophis, new species of, 357- 



Xiphorhamphus, new species of, 443. 



Zoological Society, proceedings of 

 the, 68, 158, 229, 313, 39/, 468. 



END OF THE TWELFTH VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 

 RKD LION COURT, FLEET STREET. 



FLAMMAM. 



